Typewriting machine.



No. 789,170. PATENTED MAY 9, 1905.

M. W. POOL.

TYPE WRITING MACHINE.

APPLICATION FILLED JULY 30, 1904.

\MTNEEEE INVENTDR: (5% ha. jmfififl 2399M MM NrrEn STATES Patented May9, 1905 MORRIS 17V. POOL, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE MONAROHTYPEIVRITER COMPANY, OF SYRACUSE, NEW YORK,

A CORPORATION OF NEIV YORK.

TYPE-WRITING IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 789,170, dated May 9,1905. Application filed July so, 1904. Serial No. 218,779.

To all whom it may concern:

Be it known that I, MORRIS W. POOL, a citizen of the United States, anda resident of the borough of Brooklyn, city of New York, in the countyof Kings and State of New York, have invented certain new and usefulImprovements in Type VVriting Machines, of which the following is aspecification.

My invention relates to type-writing machines, and more particularly tomeans for protecting the bearings of the type-bars and for restoring thelatter from printing to normal position.

In front-strike writing-machines of the type-bar class theprinting-point is usually over the bearings of the type-bars, whichlatter are therefore in a position to receive particles of dust or gritresulting from erasures as they fall from the platen; If leftunprotected, the bearings are liable to become clogged, preventing freemovement of the type-bars. Various means have heretofore been employedto remedy this defect; but so far as I am aware individual movabledustguards supported on each type-bar hanger have not hitherto beenused, and one of the main objects of my invention is to provide such aconstruction.

A further object is to provide a restoring means for the type-bar inconnection with the protecting means for the type-bar bearing.

My invention consists in the various features of construction,combinations, and arrangements of parts, all as will be hereinafter morefully described, and particularly pointed out in the appended claims.

In carrying out my invention I mount on each type-bar hanger adust-guard or coverplate, which normally protects the type-bar bearings;but this plate is so mounted and arranged that when the type-bar swingsupwardly and rearwardly to print it contacts with the forward end ofsaid plate and moves it rearwardly, thus allowing the type-bar to makeits full excursion. This cover-plate is spring-pressed in the oppositedirection, and thus is automatically restored to normal position duringthe return of the type-bar to its normal position, and the parts are sorelated that the spring assists the return movement of the type-bar.

One form of the invention is embodied in the accompanying drawings, inwhich Figure 1 is a vertical front-to-rear sectional view takencentrally of the machine, various parts which are not material beingomitted. Fig. 2 is a side elevation of a hanger and a portion of itsassociated type-bar, showing the position of the dust-guard when thetypebar is in printing position. Fig. 3 is a fragmentary front view ofthe segment with a number of hangers mounted thereon. This view is takenon the plane represented by the line w of Fig. 1. Fig. 4 is a plan, onan enlarged scale, of a dust-guard and hanger.

The same numerals of reference indicate the same parts throughout thevarious views, in Wl1iCh- 1 is the base of the machine.

2 represents corner-posts upholding a top plate 3, which in turnsupports a carriage (not shown) of any desired construction, the platen4c of said carriage being diagrammatically illustrated. Key-levers 5,provided with finger-keys 6 and returning-springs 7 are pivoted at 8 inthe rear of the base 1.

Pivoted at 9 to the key-levers are sublevers 10, each having a slot 11near its lower end, said slot embracing a fixed fulcrum-bar 12, whichpasses from side to side of the machine beneath the key-levers and issupported in the side frames.

Connected at 13 to the upper end of sublever is a link 14, the forwardend of which is pivoted at 15 to the type-bar 16. The typebar issupported at its type end by a typerest 17, said rest being upheld byseveral horizontal arms (one of which, 18, is shown in Fig. 1)projecting forwardly from the segment 19. It is immaterial to thepurpose of this invention whether the segment is fixedly or movablysupported in the machine. The hanger-supporting portion of the segment19 is provided with radial slots 21. Each of the hangers 22 has a notchor cut-away 23, by which the hanger may be fitted over thehanger-supporting portion 20 of the segment and into the appropriateradial slot 21, in which position it is secured by a set-screw 24,passing through the rear wall 25 of the hanger and abutting against therear vertical face of the segment. Forward of the segment the hanger 22is provided with side walls 26, wherein the type-bar 16 is pivoted at27.

The protecting means for the type-bar bearing as herein embodiedconsists of a plate 28, of sheet metal, having substantially the samedimensions in plan as its associated hanger 22, to which it is securedby headed pins or screws 29. These pins are driven into holes in thehanger through slots 30 in the dust-guard plate 28, Fig. 4, so as topermit the said dustguard plate to have a limited movementlongitudinally of the hanger, while at the same time it is held frommovement in a direction upward or away from the hanger by the heads ofthe pins 29 and from movement in a lateral direction by the sides ofslots 30 and the body portions of the pins 29. The rear walls of theslots 30 normally contact with pins 29, as best shown at Fig. 4, thisposition being maintained by a curved leaf-spring 31, said spring beingattached to the hanger by the set-screw- 24. Just to the rear of itspivot 15 the typebar is formed with a normally vertical face 32, whichjoins at right angles a face 33, formed on the type-bar forward of thepivot 27.

When finger-key 6 is depressed, the typebar 16 is actuated in a mannerwell understood, and after it has moved some distance toward the platenthe parts are so related that the type-bar will contact with the forwardend of the dust-guard plate 28 at the junction of the faces 32 and 33. Afurther rearward movement of the type-bar gradually forces thebearingprotector 28 rearwardly against the action of its spring 31 untilthe type-bar reaches the printing-point, when the parts are in therelative positions shown in Fig. 2. It will be apparent that as thedust-guard plate 28 is moved backward its rear portion is held frommotion upward or away from the hanger by the heads of screws 29, whilethe forward end will be similarly restrained by the face 32 of thetypebar. After the type has printed the tension of spring 31, actingthrough the dust-guard 28, will serve to assist in restoring the typebarto normal position.

It is evident from the construction herein illustrated that when thetype-bars are all in normal position their bearings will all be coveredby their respective dust-guards when viewed from the printing-point onthe platen. IVhen any particular type-bar is actuated to print, thedust-guards of all the remaining type-bars are unmoved. It is only thedustguard of the bar actuated which is moved.

Various changes may be made in the means to accomplish the resultsherein set forth without departing from the scope of this invention.

I desire to be understood as limiting the term dust-guard as employed inthe subjoined claims to a protecting means which is independentlymovable in respect of both the type-bar and the type-bar bearing.

WhatI claim as new, and desire to secure by Letters Patent, is-

1. In a ty pe-writing machine, the combination with a type-bar, of anindividual dustguard for the type-bar bearing, said dustguard beingadapted to be automatically actuated by contact of the type-bar.

2. In a type-writing machine, the combination with a type-bar of adust-guard for the type bar bearing, said dust guard being adapted to beactuated by the type-bar when it moves to print.

3. In a type-writing machine, the combination with a type-bar andkey-actuated means for operating the same, of a dust-guard for thetype-bar bearing, said dust-guard being adapted independently to assistin restoring the type-bar to normal position.

4:. In a type-writing machine, an individual type-bar hanger whollysupporting a movable roof or cover.

5. In a visible-writing machine, the combination of a hanger, a type-barpivoted in the hanger and a slotted spring pressed plate mounted on thehanger and adapted to be moved rearwardly as the type-bar moves towardthe platen.

6. In a type-writing machine, the combination of a type-bar and adust-guard for the type-bar bearing, the type-bar when moving to printbeing adapted to actuate the dustguard in one direction and to beactuated by the dust-guard during its return motion.

7. In a type-writing machine, a series of type-bar hangers each providedwith a separate spring-pressed dust-cover for the bearings of thetype-bars.

8. In a type-writing machine, the combination of a type-bar hanger, atype-bar pivotally mounted therein, and a reciprocatory cover-platemounted wholly on said hanger.

9. In a type-writing machine, a type-bar hanger, a type-bar pivotallymounted therein, means for actuating said type-bar, and a coverplatemounted on said hanger and adapted to be actuated in one direction whensaid typebar is actuated to print.

10. In a type-writing machine, a type-bar hanger, a type-bar pivotallymounted therein, means for actuating saidtype-bar, and a coverplatemounted on said hanger and adapted to be actuated in one direction bythe type-bar and in the opposite direction by a spring.

11. In a type-writing machine, the combination of a type-bar hanger, amovable coverplate supported thereon, and a type-bar constructed at itspivotal end to move said coverplate when the type-bar approaches theprinting position.

12. In a type-writing machine, the combination with a type-bar hangerprovided with a movable cover-plate, and a key-actuated type-barpivotal] y mounted in said hanger and adapted to move said cover-plate,the said typebar being notched or cut away so as not to act on saidcover-plate during the Whole printing stroke of the type-bar but only ata predetermined time thereof.

13. In a type-writing machine, the combination of a type-bar hangerprovided with a spring-pressed movable top plate and with means forholding and guiding said plate.

1a. In a type-writing machine, the combination of a type-bar, a type-barhanger, and a movable dust-shield wholly supported on said hanger.

15. In a type-writing machine, the combination of a type-bar. a type-barhanger, a dust-shield supported on the hanger and movable in the path ofthe type-bar and movable rearwardly by the contact of said type-bar whenthe latter is actuated to print.

16. In a type-writing machine, the combination of a hanger, a type-barpivoted in said hanger, and an individual dust-guard which covers thepivots of said type-bar when the latter is in normal position, saiddust-guard being mounted on a fixed part of the machine.

Signed in the borough of Manhattan, city of New York, in the county ofNew York and State of New York, this 29th day of July, A. D. 1904:.

MORRIS W. POOL.

WVitnesses:

CHARLES E. SMITH, J. B. Dnnvns.

